Disk strain-insulator.



L. STEINBERGER.

DISK STRAIN'INSULATOR.

APPLICATION FILED APR. 9. 19l3.

1,212,706. Patented Jan 16,1917.

" UNITED STATES PATENT omen.

LOUIS STEINBERGER, or BROOKLYN, NEWYORK.

DISK STRAIN-INSULA'I'Ofi.

To all whom it may concern I 4 V Be it known that I, LOUIS Srnixnnnonn,

residing at Brooklyn, in the county of Kings and State of Xew York, have invented certain new and useful Improvements in Disk Strain-Insulators, of which the following is a specification. I

This invention relates to a disk type strain insulator and a principal object there- 1 of is to provide an insulator of this type and limit said flexing.

A further object is to provide'aninsulator -comprising a disk considerably wider than thick. to provide strain members disposed upon the opposite flat surfaces of said disk arranged in substantially right angular relation to each other in such position as to impart a crushing strain to the material of the insulator, and to provide housings formed on said disk for inclosing parts of said strain members. I

A further object is to shape the opposite surfaces of the disk so that substantially only the central portions of said surfaces will engage adjacent central portions of the bars or strain members whereby the central ortion only of said disk is normally sub-. ected to crushing strain.

A further object is to provide bails connected with the opposite ends of said barsor strain members adjacent the periphery of said disk, said bails having portions for the attachment of cables or the like and having intermediate portions, including the cable "attaching parts, spaced a considerable dis- I 'tance from the surfaces of said disk.

Afurther object is to provide means upon the'surface of the insulator for protecting thebars or strain members from moisture.

Afurther object is to provide reinforcing members upon the surfaces of the disk extending continuously I across the periphery I thereofm Other objectsand aiinsof the invention which is flexible in its construction so that Patented Jan. 16, 1917;

Application filed April 9, 1913. Serial No. 759,939. I

nore or less specific than those referred to above, will be in part obvious and in part pomtedout in the course of the following description of 'the elements, combinations. arrangements of parts and applications of pr nciples constituting the invention; and the scope of protection contemplated will be indicated intlie appended claims.

In the accompanying drawings, which are to be taken as a part of this specification and in which I have shown a merely preferred form of embodiment of the invention: Figure l is a top plan view of an insulator constructed in accordance with. the principles of the invention. Fig. 2 is a side elevation iew of the structure shown in Fig. 1. Fig. 3 is a transverse central sectional view taken substantially on the plane of line III. of Fig. "1. Fig. 4 is a fragmentary view similar to Fig. 3. but taken at right angles thereto and'illustrating a modification: and F1gs. and 6 are detail fragmentary perspective views.

Referring to the drawings for a detailed description of the inventiongthe numeral 1 indicates a disk of insulating material. preferably electrose. the diameter of the disk being approximately though not necessarily four times the greatest thickness of the disk. and the opposite surfaces of the disk being convex so that the marginal edges are relatively thin. as best seen in Fig. "2. A plurality of reinforcing ribs 2 are formed upon the opposite surfaces of the disk extending continuously across the periphery thereof and for a distance inwardly toward the center of the opposite surfaces. These ribs preferably terminate short of the center so as not to interfere with the flow of moisture across the disk and to prevent the formation of pockets and the like. They also serve as barriers interposed between the ends of .the strain members 3 peripherally of the disk.

Extending across the opposite surfaces of the disk centrallyvtlzereof, and arranged, in substantially right angular relation to each m other are the strain-members orbars 3. the opposite ends thereof projecting beyond the periphery of the disk as at -l. Attached to the ends 4 are bails 5. the bails having apertures 6 for the reception of the ends -l. and

the ends of the strain inembei's for retaining the bails against detachment.

In order to retain the strain members in their prescribed relations, suitable liousii'i'gs'j may bemoidedias integral parts of the disk 1 ifdesired, the said housings inclosing. the respective strain members in such mannor as to providey ineifectQapeitures 11 bein through which the strain members project.

, In order that the strains applied to'the strain members 3 may be traiismitted tothe material of the 'diskl centrally thereof .1

have formed the apertures 11 tapered in both directions outwardly from the-central portion, the central portion of the aperture of a size tosnugly receive the strain mem ers, and the outer ends of theapertures being larger'so as to accommodate a relative movement of the adjacentportions of the strain members.

The strain members?) are preferably- Slightly flexible and the looseness. of the apertures 11 adjacent the ends of the strainmembers will permit .of a limited degree of' flexing 'in the strain members asjwill be i v readily apparent from an inspection of Figs. 3 and Strains applied to the ends of the a strain members through the bails 5 therefore are absorbed to an appreciable degree;

by the flexing of the two strain members within the body of-tlie insulator without in any way affecting the int grity thereof.-

.Tlie direct strains between the two strain members 3 are applied as a crushing strain between the central portions of-the strain members only. Further strain upon the ma-' te 'ial. of the insulator will only be sustained after a maximum amount of flexing has been given thestrain members, The flexing quality of the strain members is preferably calculated so as to withstand a very great strain w thout imparting direct pres- .sure from their ends against the adjacent walls of the apertures 11. In event'that such pressure I does take place the force thereof will be already so spent as. to be practically negligible and the material of fwhicli the disk is formed will be fully capable of resisting it. a t The bails 5 have their intermediate poitions. including a part 12 for the attachment of, cablesespaced av considerable distance fronithe, surfaces of the diskso as to precludethe possibility of arcing therefrom to the disk or to the opposite strain member within the housing on the disk. The strain members 3 are preferably cylindrical and --the apertures, 11 likewise cylindrical so as'to ing the ends, of thebailjwitl the insulator.

permit free swinging of the hail, the strain members serving as pivot rods for connect In instances where ,thelinsu lator' is employed is vertical, it may be desirablevto provide a v Petticoat 13 upon the under snrfacethereofl 'I. claim asv new and in such relation that its central] axis this petticoat being preferably concentric with the disk and depending therefrom at or'near the peripherythereof so as to inters'urface toward the lower strain member.

@The disposition and relative proportions of the Petticoat obviously :also add materially to the mechanical strength of the insulator It may be. noted that the housings 10 ex- 4 tending across the opposite surfaces ofthe diskiii right angular relationmaterially re- "cept aflow of moisture along the under inforce the disk in sustaining strains applied 1 i to it.

As many changes could-be made in this construction without departing from the scope of the following claims, it is intended that all mattercontained-in the above description or shown in the accompanying Y drawing shall be interpreted as illustrative only and not in a limitingsense.

.Having thus described my invention what tei's Patent is z t v I 1. A disk type'strain insulator comprising :a disk of insulating material, oppositely fdisposeds'train membersattaclied thereto, and strengthening r bs formed upon one surface of said d sk, continuing across the periphery thereof, and continu ing" alongthe opposite surface of said disk.

v 2. .A disk insulator comprising a disk of insulating material and a' plurality of strengthening ribs formed upon the upper surface of said disk radiating froin the center thereof, continuingacross the periphery thereof, and continuing 'along the'opposite surface. of the disk toward the center thereof,

3. Adisk type insulator comprising 'a' substantially flat body of insulatingfmate'rial, reinforcin members formed upon the opposite sur aces of said disk extending entirely across said surfaces, thereinforcing A member .upon one surface being insubstantially right angular relation to the reinforcs desire to secure by Let'-.

iiig member on the other surface of the disk,

and strain members carried by said :reir fOICiIlgJDGnlbEIS. PIOJGCtlHg beyond the periphery of the disk.-

I 4. A disk type insulator comprising a substantially flat body of insulating material, 'reinforcingnnembers formed upon the opposite surfacesof said disk extending entirely across said surfaces, the reinforcing member upon one surface being. in substantially a plurality of reinforcing ribs formed upon the opposite surfacesof said disk radiating from the center thereof.

5. A disk type insulator comprising a substantiallyflat body of insulating-material,

reinforcing members formed upoi f-'the op-' posite surfaces of said disk extending entirely. across said SilrfaCeS, i

right angular relation. to the reinforcing -member on the other surface of the disk, and

member upon one surface being in substantlally 11%: angular relation to the reinforcmg mem .r on the other surface of the disk,

means projecting from the ends of said reof insulating material, a plurality of op-' by its intermediate portion, and being connected with posite ends.

A strain insulator comprising a body saidsuspension means by its opof insulating material, suspension means, a

spring bar carried by said body disposed substantially tran'syerse to the general line of strain, said spring bar being connected at one oint In its length to the suspension mem erand at another point in'l'its length to the insulator body,

M8,; A strain insulator, comprlsmga disk' posingly disposed strain members carried I thereby, one of said strain members being disposed in substantially right angular re 80 a as , posingly disposed strain members, each of latlon to anotherof said strain members,

each of said strain members being arranged to extend diametrically of the disk and'having its opposite ends terminating adjacent the'perip cry of the disk, means for attach ing conductors, 'to, the ends of the strain members, and barriers interposed between the ends of the strain members peripherally of the disk.

9.-A'strain insulator, comprising a disk ofinsulatin'g material, plurality of op said strain members comprising a rod \arranged to extend diametrically of the disk, means for attaching conductors to the ends of the strain members, and barriers interosed between the ends of the/strain memrs peripherally of the disk. [4 s 10. A strain insulator, comprising a disk of insulating material, a plurality of opposingly disposed strain members, each of said strain members comprising a. rod arranged to extend diametrically of the. disk,

. means for attachin conductors to the ends of the strain mem ers, barriers interposed between the ends of the strain members peripherally of the disk, and said strain members bein flexible so as to yield when strain is applied thefieto from said conductor attachm meansi 11. strain insulator, comprising a disk of insulating material, a plurality of op-, posingly disposed strain members each of said strain members being arranged to extend diametrically of the disk and. having its opposite ends terminating adjacent the periphery of the disk, means forattaching conductors to the ends of the strain members. barriers interposed between the ends of the strain members peripherally of the disk, said strain members con'iprisingnormally straight rods of flexible material, and the surfaces of the disk underlyingsaid rod: being shaped toengage said rods at the central'portions of said rods onlyso as to permit said rods to flex when strain is applied to-the endsthereof. a

12. In a strain insulator a bodyof in- *sulating material, a pair of strain members carried thereby, atleast one of said strain members comprising a flexible rod, adapted to" be disposed transversely ofvtl ealine or strain, and means for attaching conductors I said pi ot'means permits alimitedlmovement between said body of insulating materialand said bail in the general direction of strain. I ,z,

"14. A strain insulator, comprising a body of insulating material having'convex opposite surfaces, a-strain member extendingvdim 'metricallyacross onesurfa ce of saidrbody, "a strain member extending dlametrlcally across the opposite surface, of the body, each of said strain members comprising a rod having its ends terminating adjacent the marginal edges of the body, conductor attaching means engaging the two ends of one strain member, conductor attaching means engaging the'two ends of the other strain member, said conductor attaching means being disposed to urge the. strain members toward the respectivesurfaces of the body, and both of said strain members being flexible and being in engagement with the respective surfaces of the body at their central portions only so as to be capable offlexing when strain is applied to the opposite ends thereof through said conductorattaching means.

15. A strain insulator, comprising a body of insulating material having convex opposite surfaces, a strain member extendin diametrically across one surface of said od aastrammember extendin having its ends terminating adjacent the.

marginal edges of the body, conductor atta'ching means engaging the two ends of one strain member," conductor" attaching means '-en gaging the two ends of the other strain ible and being in ing disposed to member, said conductor attaching means beurge the strain members toward the respective surfaces of the body, and both of said strain. memb'ers-bein flexengagement with t e-respective surfaces of the body at their central portions only so as to be capable of flexing'when strain is applied to the opposite ends thereof through said conductor attaching means, and means formed upon the pposite surfaces of'the body for retaining the strain members against displacement. I

16.A disk strain insulator vcomprising, a

' disk of insulating material of greater d1am-- substantially- '2 0 cent the periphery of the disk, strain mem- 'str'ain members comprising opposingly a disk, and th members, said housings being disposed in substantially right angular relation to each" eter than thickness adapted to .be dis osed transversely of the genera line of strain, bails arranged .at opposite sides of said disk having portions extending to adjabers connecting said bails with said disk, sgid posed rods extending diametrically of the disk having. parts formed thereon comprising housings or,the strain other so as to retain the strain members in substantially right angular.relation to each i othe'r..

17. A strain insulator, comprising a body of insulating material su ension'..means therefor, a member carriedfll y the bod to which isaid sus' ension means is 'attac' ed,..

said member eing adapted to be flexed under stress from said and said body having a p suspension means,

flexible and being part disposed to member. p 18. A strain insulator, comprising a body of insulating materi l, a strain member car limit the flexing of said members of insulating material,

terial of the bo mmm= ried' thereby comprising a rod arrangd'soas to extend substantially transversely of the general direction of strain when a second strain member also arranged'soas to extend substantially transversely of the general direction two strain-members being arranged to exto each other, a portion oi t e insulating .material of the body being interposed between said strain members and engaging said strain" members at their central portions only, means for. attaching conductors to said strain members, and said strain being flexible to yield laterally under-stra n. '19. A strain insulator, comprising a body I a strain member carried thereby comprising a rod armnged 'so of strain when'in use,*sa'id Y tend in substantially right an1lar relation as to extend substantially transversely oi ed to extend substantially transverse yof .the general direction of'strain when in;1ise,,said

two strain members being arrangedItoex- .tend insubstantially right angular relation 1; .0, y being interposed between I to each other, 'a ortion of the insulating ma-:

said strain members and engaging said strain members at their central portions only, means for attaching conductors to said strain members,-and portions of saidinsuthe general direction of strain when-in a second strain member also arra' lating material being disposed to loosely surround said strain members to retain said.

strain members in substantially right angu- I lar relation.

' f In testimony whereof l aflizr mytsigllature in the presence of two witnesses.

Lou s STEINBERGER;

L. Gnssrono HANDY, Q i Na'nmnm THOMPSOLL, 

